This is provably untrue. I just searched YT for "JRE Alex" and the first three results are clips from the "JRE" show (I didn't know what that acronym was before now) featuring Alex Jones [0].
Why are people repeating these complotist theories when it takes five seconds to disprove them.
Also, even if it was true (which it isn't), it still wouldn't be censoring. Censoring would mean not returning results when a match exist -- not massaging the SERP. It would also mean not publishing clips from said "censored" content on Google's own video platform, where they have millions of views.
In France there is a controversial (to say the least) comedian, Dieudonné, a holocaust denier and an anti-semite. He's heavily censored by the French government who regularly bans his shows; but canceling his YT channel happened only recently, after a lot of interventions by the state and other non-governmental agencies.
It's been my experience that Google is quite resistant to censoring, in general.
[0] Here are the top three results on YT for "JRE Alex":
Alex Jones - God Doesn't Know Where He Came From | Joe Rogan
2.6M views 3 years ago
JRE Clips
Taken from Joe Rogan Experience #1255 w/Alex Jones: https://youtu.be/-5yh2HcIlkU.
3:43:03
Joe Rogan Experience #911 - Alex Jones & Eddie Bravo
13M views Streamed 5 years ago
PowerfulJRE
Alex Jones is a radio show host, filmmaker, writer, and conspiracy theorist. Eddie Bravo is a jiujitsu black belt, music producer, and ...
3:11:09
Joe Rogan Experience #1555 - Alex Jones & Tim Dillon
23M views 1 year ago
PowerfulJRE
Tim Dillon is a standup comedian, actor, and host of the Tim Dillon Show. Alex Jones is a filmmaker, writer, and host of the Alex ...